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Finding the Fourth Proportional to 74,819.40, 112,010.40 and 72,632.40

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Solution

The fourth proportional to 74,819.40, 112,010.40 and 72,632.40 is: 108,736.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,819.40 : 112,010.40 = 72,632.40 : x
  2. Step 2: Convert to fraction form
    74,819.40/112,010.40 = 72,632.40/x
  3. Step 3: Cross multiply
    74,819.40x = 112,010.40 × 72,632.40
  4. Step 4: Simplify right side
    74,819.40x = 8,135,584,176.96
  5. Step 5: Solve for x
    x = 8,135,584,176.96/74,819.40
  6. Step 6: Final answer
    x = 108,736.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.